Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1997 1997 Service Manual ENGINE SECTION ENGINE (DOHC) MSA5TCD97L3472
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2-3b SERVICE PROCEDURE
3. Camshaft
3. Camshaft
A: REMOVAL
1. RELATED PARTS
Remove timing belt, camshaft sprockets and related parts.
2. CAMSHAFT LH
G2M0743
1) Remove camshaft position sensor.
2) Remove ignition coils.
3) Remove rocker cover and gasket.
4) Loosen intake camshaft cap bolts equally, a little at a
time in the numerical sequence shown in figure.
5) Remove camshaft caps and intake camshaft.
G2M0744
30
SERVICE PROCEDURE 2-3b
3. Camshaft
6) Loosen exhaust camshaft cap bolts equally, a little at a
time in the numerical sequence shown in figure.
7) Remove camshaft caps and exhaust camshaft.
CAUTION:
Arrange camshaft caps in order so that they can be
installed in their original positions.
8) Similarly, remove right-hand camshafts and related
parts.
G2M0745
B: INSPECTION
1. CAMSHAFT
1) Measure the bend, and repair or replace if necessary.
Limit:
0.020 mm (0.0008 in)
2) Check journal for damage and wear. Replace if faulty.
3) Measure outside diameter of camshaft journal. If the
journal diameter is not as specified, check the oil clear-
G2M0746 ance.
Camshaft journal
Front Center, rear
31.946 -- 31.963 mm 27.946 -- 27.963 mm
Standard
(1.2577 -- 1.2584 in) (1.1002 -- 1.1009 in)
4) Measurement of the camshaft journal oil clearance
(1) Clean the bearing caps and camshaft journals.
(2) Place the camshafts on the cylinder head. (Without
installing valve rocker.)
(3) Place plastigauge across each of the camshaft
journals.
(4) Install the bearing caps.
CAUTION:
B2M1216 Do not turn the camshaft.
(5) Remove the bearing caps.
(6) Measure the widest point of the plastigauge on
each journal.
If the oil clearance exceeds the limit, replace the cam-
shaft. If necessary, replace the camshaft caps and cyl-
inder head as a set.
Standard oil clearance:
0.037 -- 0.072 mm (0.0015 -- 0.0028 in)
Limit:
0.10 mm (0.0039 in)
(7) Completely remove the plastigauge.
31
2-3b SERVICE PROCEDURE
3. Camshaft
5) Check cam face condition; remove minor faults by
grinding with oil stone. Measure the cam height H; replace
if the limit has been exceeded.
Cam height: H
Standard:
Intake:
42.20 -- 42.30 mm (1.6614 -- 1.6654 in)
Exhaust:
Front: 42.50 -- 42.60 mm (1.6732 -- 1.6772 in)
B2M1209A
Rear: 41.40 -- 41.50 mm (1.6299 -- 1.6339 in)
Limit:
Intake:
42.04 mm (1.6551 in)
Exhaust:
Front: 42.34 mm (1.6669 in)
Rear: 41.24 mm (1.6236 in)
Cam base circle diameter A:
28.0 mm (1.102 in)
6) Measure the thrust clearance of camshaft with dial
gauge. If the clearance exceeds the limit, replace caps and
cylinder head as a set. If necessary replace camshaft.
Standard:
0.040 -- 0.080 mm (0.0016 -- 0.0031 in)
Limit:
0.1 mm (0.004 in)
B2M1217
32
SERVICE PROCEDURE 2-3b
3. Camshaft
C: INSTALLATION
1. CAMSHAFT
B2M1304F
Tightening torque: Nm (kg-m, ft-lb)
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